| 明渠水流测线平均流速横向分布及其应用 |
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| 引用本文： | 韩金旭,李敬茹,杜凯,蔡大应,李昭悦.明渠水流测线平均流速横向分布及其应用[J].灌溉排水学报,2013,32(3):71-73,100. |
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| 作者姓名： | 韩金旭 李敬茹 杜凯 蔡大应 李昭悦 |
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| 作者单位： | 1. 黄河水利科学研究院,郑州,450003
2. 黄河勘测规划设计有限公司,郑州,450003 |
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| 基金项目： | 国家重点基础研究发展计划，"十二五"国家科技支撑计划，中央级公益性科研院所基本科研业务费专项资金项目 |
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| 摘 要： | 基于室内与田间试验,分析了明渠水流流速分布特性,提出了水流测线平均流速横向分布抛物线规律和明渠测流方法。结果表明,抛物线规律表达测线平均流速横向分布具有较高的计算精度,在(1-2x/B)>0.1的范围,实测与拟合计算流速的相对误差在±5%之间;利用测线均速抛物线规律对不同渠形测流具有良好的适用性,相对误差在±5%之间,且减轻了田间施测工作量和便于灌区测流自动化。
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| 关 键 词： | 明渠 测线平均流速 抛物线律 量水 |
Lateral Distribution of Average Vertical flow Velocity and Its Application in Open Channel |
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| HAN Jin-xu,LI Jing-ru,DU Kai,CAI Da-ying,LI Zhao-yue.Lateral Distribution of Average Vertical flow Velocity and Its Application in Open Channel[J].Journal of Irrigation and Drainage,2013,32(3):71-73,100. |
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| Authors: | HAN Jin-xu LI Jing-ru DU Kai CAI Da-ying LI Zhao-yue |
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| Institution: | 1(1.Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China;2.Yellow River Engineering Consulting Co.,Ltd.Zhengzhou 450003,China) |
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| Abstract: | Based on indoor and field experiments,velocity distribution properties of open channel were analyzed,the parabolic law for lateral distribution of average vertical flow velocity was established in open channel,and the method for flow measurement in open channel was put forward based on the parabolic law.The results showed that apart from a few point,the fractional errors between measured velocities and calculated velocities by the parabolic law were smaller than±5% when(1-2x/B)>0.1.In addition,the method for flow measurement was adapt to different forms of channels with high accuracy. |
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| Keywords: | open channel average vertical flow velocity parabolic law flow measurement |
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